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Andrew Purtell commented on HBASE-6427: --------------------------------------- bq. The default behavior is followed when RegionObserver.pre{flush|compact} return a null scanner, which is what BaseRegionObserver does by default. Fine, I was misled by the unit test code. bq. I think we'd need a preStoreScannerOpen, which would be called in Store.getScanner (right before the new StoreScanner is created) to allow the coprocessor to return a custom scanner here too. Sounds good to me. > Pluggable compaction policies via coprocessors > ---------------------------------------------- > > Key: HBASE-6427 > URL: https://issues.apache.org/jira/browse/HBASE-6427 > Project: HBase > Issue Type: New Feature > Reporter: Lars Hofhansl > Priority: Minor > Attachments: 6427-notReady.txt, 6427-v1.txt > > > When implementing higher level stores on top of HBase it is necessary to > allow dynamic control over how long KVs must be kept around. > Semi-static config options for ColumnFamilies (# of version or TTL) is not > sufficient. > The simplest way to achieve this is to have a pluggable class to determine > the smallestReadpoint for Region. That way outside code can control what KVs > to retain. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira